38
WT.050.700.000.DE.IM.0319
Interfaces
DEPOLOX
®
400 M
4.
4.2
RS485 interface
The RS485 interface is used for data transfer to higher-level control sys
-
tems such as the Process Monitoring system or other systems that sup
-
port the Wallace & Tiernan RS485 protocol. For more detailed
information, please refer to the operating manual “RS485 interface.” You
can request this operating manual from us or download it from our home
-
page.
The RS485 interface is electrically isolated. It has four integrated termi
-
nals, a terminating resistor R
t
and balancing resistors R
u
and R
d
for incor
-
poration into a Wallace & Tiernan bus system.
Image 2 Detail of PCB - RS485 interface
A DIP switches for activating the resistors:
DIP switch 1 (left): Balancing resistor R
u
DIP switch 2 (center): Terminating resistor R
t
DIP switch 3 (right): Balancing resistor R
d
B Terminals, RS485 interface
Please note
For installation at the end of the bus, the DIP switch R
t
must be activated
(position ON). For installation in the middle of the RS485 bus, R
t
must be
set to OFF.
A shielded, twisted 2-wire cable (twisted pair) with a wire cross-section of
at least 0.25 mm² (24 AWG) must be used as the transfer medium. The
characteristic impedance of the cable must be between 100 ohms and
130 ohms, the cable capacity if possible < 60 pF/m. The shielding
improves the electromagnetic compatibility (EMC). The bus cable is
always wired as a bus from device to device. Any stub cable to the bus
device must not exceed a length of 0.3 m. Longer branch-offs in the bus
cable are not permissible! We recommend the cable W2T504634 -
LiYCY(TP) 2 x 0.25 mm².
B
A
Summary of Contents for WALLACE & TIERNAN DEPOLOX 400 M
Page 1: ...WALLACE TIERNAN DISINFECTION ANALYZER DEPOLOX 400 M Version 1 00 and later OPERATING MANUAL...
Page 2: ...2 WT 050 700 000 DE IM 0319 DEPOLOX 400 M Please note Original operating manual...
Page 36: ...36 WT 050 700 000 DE IM 0319 Description DEPOLOX 400 M 3...
Page 74: ...74 WT 050 700 000 DE IM 0319 Installation DEPOLOX 400 M 5...
Page 118: ...118 WT 050 700 000 DE IM 0319 Maintenance DEPOLOX 400 M 7...
Page 137: ...DEPOLOX 400 M Wiring diagrams 9 137 9 Wiring diagrams...
Page 138: ...138 WT 050 700 000 DE IM 0319 Wiring diagrams DEPOLOX 400 M 9...
Page 139: ...DEPOLOX 400 M Wiring diagrams 9 139...
Page 140: ...140 WT 050 700 000 DE IM 0319 Wiring diagrams DEPOLOX 400 M 9...
Page 142: ...142 WT 050 700 000 DE IM 0319 Explanations and Certificates DEPOLOX 400 M 10...
Page 143: ...DEPOLOX 400 M Explanations and Certificates 10 143 10 1 1 CSA certificate...
Page 144: ...144 WT 050 700 000 DE IM 0319 Explanations and Certificates DEPOLOX 400 M 10...
Page 145: ...DEPOLOX 400 M Explanations and Certificates 10 145...
Page 146: ...146 WT 050 700 000 DE IM 0319 Explanations and Certificates DEPOLOX 400 M 10...